15 May 2017 Properties of diffraction gratings holographically recorded in poly(ethylene glycol)dimethacrylate-ionic liquid composites
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Abstract
We investigated recording and readout of transmission gratings in composites of poly(ethylene glycol) dimethacrylate (PEGDMA) and ionic liquids (IL) in detail. Gratings were recorded using a two-wave mixing technique for different grating periods, exposures and a series of film thicknesses. The recording kinetics as well as the post-exposure behavior of the gratings were studied by diffraction experiments. We found that - depending on the parameters - different grating types (pure phase or mixed) are generated, and at elevated thicknesses strong light-induced scattering develops. Gratings with thicknesses up to 85 micrometers are of the required quality with excellent optical properties, thicker gratings exhibit strong detrimental light-induced scattering. The obtained results are particularly valuable when considering PEGDMA-ionic liquid composites for applications as e.g., holographic storage materials or as neutron optic diffractive elements.
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Mostafa A. Ellabban, Mostafa A. Ellabban, Gašper Glavan, Gašper Glavan, Peter Flauger, Peter Flauger, Jürgen Klepp, Jürgen Klepp, Martin Fally, Martin Fally, } "Properties of diffraction gratings holographically recorded in poly(ethylene glycol)dimethacrylate-ionic liquid composites", Proc. SPIE 10233, Holography: Advances and Modern Trends V, 1023310 (15 May 2017); doi: 10.1117/12.2264231; https://doi.org/10.1117/12.2264231
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